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| author | Richard Henderson <rth@redhat.com> | 2012-08-01 13:41:16 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2012-08-01 13:41:16 -0700 |
| commit | 70ce4a25c465584cee191674cefe7b00aa47def4 (patch) | |
| tree | 040c558b53700de0429c84a129ccd952f1ec8dfb /gcc/function.c | |
| parent | 91f8035e9b79eef334ef701af7bb05ff9b5780be (diff) | |
| download | gcc-70ce4a25c465584cee191674cefe7b00aa47def4.zip gcc-70ce4a25c465584cee191674cefe7b00aa47def4.tar.gz gcc-70ce4a25c465584cee191674cefe7b00aa47def4.tar.bz2 | |
re PR middle-end/34548 (GCC generates too many alignment adds for alloca)
PR 34548
* function.h (struct rtl_data): Add max_dynamic_stack_alignment.
* cfgexpand.c (gimple_expand_cfg): Initialise it.
* explow.c (allocate_dynamic_stack_space): Set it. Simplify
alignment requirements given the known alignment of dynamic_offset.
* function.c (instantiate_virtual_regs): Align dtnamic_offset.
From-SVN: r190051
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/function.c b/gcc/function.c index f1e0b2d3..827f687 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -1892,7 +1892,14 @@ instantiate_virtual_regs (void) /* Compute the offsets to use for this function. */ in_arg_offset = FIRST_PARM_OFFSET (current_function_decl); var_offset = STARTING_FRAME_OFFSET; + dynamic_offset = STACK_DYNAMIC_OFFSET (current_function_decl); + if (crtl->max_dynamic_stack_alignment) + { + int align = crtl->max_dynamic_stack_alignment / BITS_PER_UNIT; + dynamic_offset = (dynamic_offset + align - 1) & -align; + } + out_arg_offset = STACK_POINTER_OFFSET; #ifdef FRAME_POINTER_CFA_OFFSET cfa_offset = FRAME_POINTER_CFA_OFFSET (current_function_decl); |